What kind of power supply do I need for two devices?
This will be comfortably covered by a 100 watt transformer 9-0-9 volts ac centre tapped or 15 volts ac secondary. All the supplies can be derived by rectifying and smoothing this. the current power supplies for device 2 and 3 are 6V @ 1A so they would take 6 Watts.
How many watts does device 2 and 3 use?
All the supplies can be derived by rectifying and smoothing this. the current power supplies for device 2 and 3 are 6V @ 1A so they would take 6 Watts. So the total would be 60.58 watts.
Can a regulated power supply keep the voltage exactly the same?
No supply, even a regulated one, can keep its output voltage exactly at the rating. Usually due to the way the supply works, there will be some frequency at which the output oscillates a little, or ripples.
How many DC diodes do you need for single power supply?
I suggested a 9-0-9 volt transformer, not a +9 -9 dc supply. Using a centre tapped transformer like this means you only need two rectifier diodes, although you will notice the voltage needed is slightly higher than with a bridge rectifier and a single secondary.
Can you use an AC charger with a 5V Charger?
As long as the voltage matches that expected by the connected device, then yes, you can use an AC adapter capable of providing higher amps. Can I use a 5V 2A charger with a 5V 1A device? Yes. Because a) the voltage matches, and b) the amperage provided is greater than that needed, you can use a 5v-2A charger with a 5V-1A device.
What kind of power supply do I need for a car charger?
However you can certainly obtain 12 volt supplies in the range 5 to 7.5 amps which is what you need. Many auto battery chargers run up to 6 amps which would be ideal. they would also give you a safety margin but would require smoothing capacitors.
Does it make sense to power all devices from one power source?
Each ones comes with a own power supply. This leads to a waste of space and a mess with all the cables. Does it make sense to power all devices from a single power source? I would simple buy a power supply which provides enough current to power all devices and would connect all the cables to this single power supply.
What kind of power supply do computer peripherals use?
Computer peripherals simply use power from USB, and with the new higher power USB standard I expect manufacturers to stop using external power supplies altogether except for unusually high power devices.